Portable window cleaning scaffold



Filed Feb. 8, 1939 5 Sheets-Sheet 1 102202070 ji eZarzd IN VEN TOR.

A TTORNEYS.

Patented Mar. 2s, 1940 v I UNITED STATES 2,194,973 v PORTABLE wmnow CLEANING 'scAFFoLn Newtondreland, Minneapolis, I Application February 8, 1939, Serial No;-255,s11-

' screams. (01.304 27) This invention relates to portable window scaffolds, the primary object of the invention being,

to provide a portable scaffold or platform which may be readily and easily secured adjacent to a 5 window, so that the person washing .or repairing the window may stand thereon and have free use of his hands and arms to accomplish the Work.

An important object of the invention is to pro vide a device of this character including a guard section which may be extended to various heights,

toafiord ample protection for the worker while Washing the upper sashes of windows, where the worker is required to reach high above his head. i A further'object of the invention is toprovide lli'supporting:v arms for the sca'fifold ,or platform, which may be adiustedradapting the device for use with windows and window sills of various constructions.

A still further object of the invention is to 'provide a scaffold or platform which is exceptionally light-and easily handled, due consideration having been given to the strength anddurability of the structure to insure stability of the scaffold or platform while in use. v

With theforegoing and other objects in View, which-will appear-asthe description proceeds, the invention resides in the combination and arrangement of parts andin the. details ofconstruction hereinafter described and claimed, it

being understood that changes in the precise:

embodiment of the invention herein described,

may be made'within the scope of what is claimed,

without departing from the spirit of the invention. Referring to the drawings:

-Figure' 1 isv a *longitudinal sectional view through a scaffold or platform, constructed in accordance with the invention.

Figure 2 is a plan view thereof.

Figure 3 is a sectional view taken on line 3- 3 of Figure 1.

Figure' l is a sectional view taken on line 6*;

of Figure 3.

Figure 5 is a sectional view taken on line as of Figure 1.

Figure .6 is a sectional view taken'on line 6--6' of Figure 1. l Figure '7 is a sectional View taken on line l-l of, Figure 2 5o Figure 8 isa sectional view taken on line St -8.

of Figure 2."

Referringto the drawings in detailQthe mm; section of the scaffold is indicated generally by the reference character 5; and embodies parallel 5 bars 6 which are of angular construction, providing supports forthe floor boards 'l-, -whichf'are shown as holtedthereto. -While these floor boards lprovide, the flooring-for the main section, they at the same time, provide means for holding the bars 6 in. properspaced' relation with respect to To;

each other.

Secured to theffloor board fllwhich extends alongthe rear of the'main section, are upstanding boards 3 which are arranged-in horizontal spaced relationwith respect to each other. Ver- '31)) tical parallel bars indicated by the reference character v.J are. connectedto the bars 6, and

constitute thelsides of the main section of thescaflold or platform. I

The upper ends of thevertical parallel bars 9' 15 v are connected by'mean s' of the bars it which are disposed in" horizontal spaced relation with re.-

spect to the bars 6, the bars lll being however slightly zlonger than the bars 6, so that when] the device is positioned against a building 'fid 20 jacent to a Window opening, the forward ends of thebarslfi will extend appreciable distances ofi'the window.

At-both sides of the main section 5, are vertical 5 rods I2 which have their ends extendedlthrough certain of the floorboards, and through the bars 5 and H], therebeing provided cross bracing bars l3 connected withthevertical rods l2, for biasing'the main section against sagging underthe veight-ofya personstanding on the scafiold.

Secured to the forward ends of the p'arallel bars 6," are bars M. which are provided with a plurality of openings -l5 ,for thereceptio'nof the bolt l6, whereby the'b'ars M may beyadjusted 4.5

to extend various distances. beyond the' 'forward endsof'the bars 6, to meet. certain requirements ofuse forward, ends of the barsil lg. and receivethe threaded shanks H, ofthe wall engaging members so Threadedopeningsare formed in the 1 V [8 that have cushioning members l9 supported thereby, to contact with the wallto insureagainst the device disfiguring the'wallfacan Thus it will be seen that due to'this construction; the lower w front. edge of themain section may beheld at 1 various distances from the face of the wall of the building with which the device is used.

The guard section, forming a part of the scaffold, is indicated generally by the reference character 20, and comprises a rectangular frame 2| formed of angle bar material, to which the vertical boards 22 are connected, the boards 22 being arranged in parallel spaced relationwith respect to each other and disposed in such ,a way that the spaces between adjacent boards of the guard section, will accommodate the upstanding boards 8 of the main section of the scaffold, slidably mounting the vertically adjustable guard section with respect to the main section. The lower ends of the bars 22 are connected by means of the bars 23 that slide over the inner surfaces of the vertical bars 8 of the main section of the scaffold. Secured to the outer surfacesof the boards 22, is a bar 24 that slides over the outer surfaces of the upstanding boards 8, as the vertically adjustable guard section is moved.

Spring arms indicated at 25 have their lower ends secured to the base of the main section 5, the upper ends of the spring arms being free to move inwardly. Offset portions 26 and 21 are formed on the spring arms 25, and lie in the path of travel of the bar 23. Thus it will be seen that when the bar 23 engages either the offset portions 26 or 127, the vertically adjustable guard section llfl will be held against movement with the result that by moving the vertically adjustable guard section 20 to the proper position, the guard section 2|! may be adjusted to extend various distances above the upper edge of the main section 5 of the scaffold.

Pivotally mounted under the seat board H, is an actuating plate 28, which is provided with an arm 29 which may be grasped by the operator, to move the plate. One end of the plate 28 is connected with one of the spring arms 25, by means of the rod 30. The spring arm 25 at the opposite side of the scaffold, is connected with one end of the plate 28 by means of the rod 3|, while the spring arm located at the rear of the main section is connected with the plate 28 adjacent to the handle 29, by means of the rod 32. Thus it will be seen that due to this construction, the operator may by moving the arm 29 move the spring arms inwardly to disengage the bar 23 of i the vertically adjustable guard section,'allowing the guard section 28 to be moved vertically. When the arm 29 has beenmoved to its normal position, the spring arms will swing outwardly in the path of travel of the bar 23 holding the vertically adjustable section against further movement. a

Adjustably connected with the bars 10 of the main section 5, and held in position by means of the bolts 33, are adjustable sections 34 that have slidable connection with the bar 35, which is of a length to span the space of theusual window opening, as clearly shown by Figure 2 of the drawings. In useythe ends of the bar 35 rest against the window frame at the inner side of the window. The bar 35 is held in position on the Window sill, by means of the clamps 36 that are also mounted for sliding movement longi-' tudinally of the bar 35, by means of the loop members 31, the-loop members and clamps 35 being secured together, by means of the bolts 38.

In order that the forward ends of the bars It will be supported at their point of contact with the adjustable sections 34, vertical leg members 39 are provided, the leg members being formed with openings 40 for the reception of the bolts 4|, whereby the legs may be adjusted with respect to the bars l0, adapting the device for use on window sills of various thicknesses. At the lower ends of the leg members 39, are the adjustable feet 42 that have cushioning members 43 which rest on the base of the Window sash, with which the device is used.

Cushioning blocks 44 are secured to the bottom of the main section of the scaffold, so that the scaffold may be positioned on the floor or other place of support, without danger of scarring or damaging the floor surface.

From the foregoing it will be seen that due to the construction shown and described, I have provided a scaffold or platform to be used by window washers, wherein the person using the device may either operate while in a sitting position or may stand erect thereon, to wash the upper window sections. It will of course be understood that when the scaffold is used by a person reaching high above his head, the adjustable section may be moved to the limit of its extended position, guarding the person using the device against falling from the scaffold.

What is claimed is:

l. A window scaffold comprising a body portion including lower side bars, floor boards connected with the side bars, upper side bars, spaced side boards connecting the upper and. lower side bars, a vertically adjustable section including spaced side bars movable between the side bars of the body portion, means for securing the vertically adjustable section in various positions of adjustment with respect to the body portion, and means for, securing the vertically adjustable sections in various positions of adjustment.

v 2. A window scaffold comprising a box-like body portion, a vertically movable guard section mounted on the body portionand adapted to extend to a position an appreciable distance above the upper edge of the body portion, spring arms mounted on the body portion and extending upwardly within the body portion, offset portions on the spring arms providing stops disposed in the path of travel of the guard section, said stops adapted to engage the lower edge of the guard section holding the guard section in various positions of adjustment, means for operating the spring arms to disengage the spring arms and guard section, and means for securing the scaffold adjacent to a window opening.

3.-In a window scafiold, a rectangular frame embodying lower parallel bars and upper parallel bars, said upper bars being longer than the lower bars and adapted to extend into the window adjacent to which the scaffold is hung, a transversely disposed bar to which the free ends of the upper bars are connected, the transversely disposed bar being of a length to engage the surface adjacent to the sides of the Window, adjustable hook members movable longitudinally of the transversely disposed bar and adapted to hook over the window sill, vertically adjustable members mounted on the upper bars adjacent to the hook membersand adapted to rest against the window sill supporting the upper bars in horizontal positions, adjustable members carried at the forward ends of the lower parallel bars and adapted to engage the surface adjacent to the lower edge of the window, and floor bars and side bars mounted on the frame.

NEWTON IRELAND. 

